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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 23,
  • Issue 5,
  • pp. 1890-
  • (2005)

Leakage Loss in Trench-Bulge Waveguides

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Abstract

This paper shows that leakage loss is an important loss mechanism in integrated optical trench-bulge waveguides. The propagation losses due to leakage can easily exceed 1 dB/cm in these waveguide geometries. By simply using a deeper trench or a cavity in the substrate to deposit the waveguide in, the leakage losses can be reduced dramatically.

© 2005 IEEE

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